Work-support.



J. M. WIGGlN.

WORK SUPPORT.

APPLICATION FILED JULY 17, 1909.

Patented J an. 9, 1912.

2 SHEETS-SHEET 2.

ffl my liz f ZZ 1571,55

sfrarns Parnu' JOSEPH M. WIGGIN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

Patented Jan. 9, 1912.

Original application filed July 1, 1899, Serial No. 722,505. Divided and this application led July 17,

To all whom t mayl concern:

Be it known that I, Josnrn .M VIGGIN, a citizen of the United States, residing at Boston, in the county of Suolk and State of Massachusetts, have invented certain Improvements in lVork-Supports, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating I like parts in the several figures.

This invention relates to work supports and to mechanisms for controlling the movements of `work supports and for determining their positions of rest.

In general the invention aims toprovide an improved work support and controlling mechanism therefor for use with boot and shoe machinery, the type of work support to which the invention especially relates being that frequently used in machines for inserting fastenings and which is preferably controlled by mechanism constructed and arranged to depress it to permit the work to be fed freely thereover after an inserting operat-ion and to effect a final depression of the work support of greater magnitude than the work feeding depression to permit the work to be readily removed from or placed upon the work support.

More specifically the invention aims to improve the construction and operation of the mechanism for effect-ing the feeding depression of the work support whereby uniform release of the work for different thicknesses of the work may be obtained,to render the act-ion of this releasing mechanism more positive and to simplify its construction, particularly as regards the number of parts of which it is composed.

Other objects of the invention are to provide improved mechanism for eecting the iinal depression of the work support and to provide a novel and improved work support having capacity forV adjustment to adapt it to a great variety of styles and kinds of work.

For purposes of illustration the invention is shown as embodied in a nailing machine of the type disclosed in my co-pending application, Ser. No. 7 22,505, filed July 1, 1899', of which application the present application Serial No. 508,184. j

is a division, the said co-pending application having now matured into Letters Patent No. 981,107, dated August 17, 1909.

In the accompanying drawings,-Figure 1 is a side elevation of the upper part ofthe machine disclosed in my co-pending application, having embodied therein the invention of this application; Fig. 2 is a rear elevation, with parts in section, of the machine shown in Fig. 1; Fig. 3 is a detail section on the line 3-3 of Fig. 2; Fig. 4l is a horizontal section through the. head ofthe machine; Fig. 5 is a `detail elevation with parts broken away `of the mechanism located in front of the loose driving pulley; and Figs. 6, 7, 8 and 9 are detail views of parts incompletely shown in the other figures.

rllhe framework of the machine which supports the operating parts comprises, as herein shown, the head. a, an upright or post Z) and a base suitably connected together. bearings a main or driving shaft Z upon vwhich the various cams are mounted and to which the loose pulley may be clutched to start the machine in operation. The fastening inserting mechanism, the work feeding mechanism and related parts will not be herein specifically described, as they constitute a part of the subject-matter of the co- The head a supports in 'suitable pending application labove identified,. and

upon. the`shoe are performed through a plate or work abutment 57 against the under side of which the work bears, and that the lateral position of the work with respect to the inserting mechanism is determined by an adjustable gage 72.

rlhe horn or work support 70 is preferably laterally adjustable with relation toV the path of movement of the driver to adapt. it to different kinds of work and in particular, when used with a machine of the type of that herein disclosed, to insure that the heels of different widthsshall bear ylevel against the presser plate or work abutment 57 and to compensate forl differences inthe thicksol plished in the construction herein shown by fitting the bottom 74 of the horn in a dovetailed slot in the split upper end of a sleeve 75, see Fig. 1, and securing it therein by a clamping screw 76. The sleeve 75 is fitted upon a portion 77 movable in bearings 78, 79 attached to the upright b and isv connected at its lower end to a rod 80 which is loosely extended through a suitable treadle (not shown) and provided below the same with a nut. rllhe upper end of the post 77 is provided with a threaded portion 83 and a smooth portion 84 of smaller diameter, the

latter litting accurately a smooth upper portion 85 of the bore of the sleeve 75, and the threaded portion 83 engaging screw threads onthe larger portion 86 of said bore, as shown in Fig. 1. The sleeve k75 is vertically adjustable by means of the screw threaded portion 86 and is firmly locked in its adjusted position by a nut 87. A strong, rigid and simple horn construction is thus provided.

The horn is normally elevated or pressed toward the plate 57 by a spring 89 which .encircles itbetween the bearings 79 and a collar 90 fast on the post 77. The horn 70 is adapted to be lowered in opposition to the spring 89 by a cam, preferably by the camshaped groove 92, see Fig. 4, in the rear face of a disk 93 fast on the main shaft d, this cam groove being suitably shaped to lower the horn a sufiicient distance to release the work and permit it to be fed by the awl. The cam disk 93 is connected to the horn by novel mechanism now to be described.

The cam groove 92 has extended intoV it lthe stud or roller 94 carried by an upwardly extending arm 95 of the lever 96, see Fig. 5, mounted upon the pivot pin or stud 97 attached to the frame of the machine. The lever 96 has an arm 98 provided with a slot 99 inwhich is adjustably secured a pin or stud 100 attached to the upper end of a connecting rod 101, see Fig. 2', pivotally secured at its lower end to a clamping bolt or lever 102, see Figs. 1 and 2, mounted on a pivot pin 103 supported in the open sides of a yoke-shaped clamp 104 which coperates with a pallet bar 105 to connect a rack bar 106 with the connecting rodV 101. The pallet Q bar 105, in the Vpresent instance, Vis pivoted atl its lower end at 107 between the sides of the yoke-shaped clamping member 104 and in order to effect a stronger and surer connection between the rod 101 Vand rack bar 106 and thereby increase the 'durability ofthe machine the pallet bar 105 has its face which coperates with the rack bar made straight and provided with a plurality of teeth which engage a plurality of teeth of the rack bar.

rlhe pallet bar is movable toward and from the rack bar in such manner that all,

' or substantially all, of its teeth wi'll'engage corresponding teeth on the rack bar 'simuloperating rack bar but it is preferable to have it self-releasing, or automatic in its action. This may be eifectedby setting the teeth on the rack bar and the teeth on theV pallet bar otherwise than at right angles to the backs of said bars.

By an inspection of Fig. 2 it will be seen that when the rod 101 is moved upward in the vdirection of the arrow 110, 'the rst movement of the said rod forces the dog or bar 102 into engagement with the upper or free end of the pallet bar 105 and forces the latter into engagement with the rack bar 106 and further movement ofthe bar 101 transfers the fulcrum of the pallet bar to its upper end which bears against the rack bar and renders the pivoted end movable to the extent that the clamping .yoke is moved in the direction indicated by the arrow 111, Fig. 2, and brings the back portion ofthe yoke clamp 104,into solid or firm engagement with the back of the rack bar, which is thus firmly clamped'on its front and rear sides or faces.

The release or disengagement of theV pallet bar takes place on the downward movement of the connecting rod 101 by the yokeshaped clamping member 104v striking the lower guide arm 112 of the rack bar. The yoke-shaped clamping member 104 has its upper surface engaged by a spring 115 which actsto cushion the movement of said Vclamping member when it strikes the upper kand having its short arm 118 connected to the post 77 above the base of the machine, and in the present instance the arm 118 is provided with. a slot 119 into which extends a block 120 mounted on a pin or stud 121 projecting from the collar 90.

On reference to Fig. l it willbe seen that the mechanism for connecting the horn to the cam 92 is located above the post and is readily accessible for repairs and compensates for different thicknesses of the work.

The clutch by which the loose pulley 222 is connected to the main shaft Z is not herein specifically described but constitutes a part of the subject-matter of a co-pendingy application Serial No. 508,183, ofl even date herewith. lt will beV suiicient for' the purposes of this specification to state Vthat the bushing 223 is' moved longitudinally on the shaft .rl in one direction by a spring-pressed f loose pulley 222which Vis carried upon the Y collar 125 which, as shown, is provided with sockets into which extend helical springs 127 which fit into sockets in a collar 129 held on the shaft by aclamping nut 130. The movable member of the clutch is positively disengaged from its coperating fixed member by a suitable mechanism comprising a rod 145 connected at its upper end to the shorter arm 144 of a lever 142 mounted on the pivot stud or pin 97 and connected at its lower end to a suitable foot treadle pivoted in the base. The shipper lever 142 is connected with suitable brake mechanism not herein specifically described by which the main shaft l is stopped at the end of its rotation.

The cam groove 92, as above described, lowers the horn a sufficient distance to permit the work to be fed, which distance is not sufficient to permit the work to be removed, and for this purpose automatic mechanism is preferably provided. The lever 142 has its short arm 144 connected by a link 170 to a crank arm 171 of a rock shaft 172 having bearings in a boss 173 attached to the head a., see Fig. 4. The rock shaft 172 has loose on it an arm or dog 175, see Figs. 4 and 5, normally pressed forward by a spring 176 having one end fast to the crank arm 171 and the other end engaging a pin 177 lon the arm or dog 175. The hub of the crank arm 171 has a projection 270, see Figs. 7 and 8, with which cooperates a projection 271 on the hub of the dog 175 to limit the forward movementof the dog caused by the spring and to limit the backward movement of the dog, this latter movement being effected by an upwardly extending latch arm 179 which is pivoted to an extension or short arm 180 of the horn lowering lever 96 and is provided at its up'per end with a notch, see Fig. 9, which is adapted to be engaged by the lower end of a lever 183, see Fig. 4, which is pivoted to a boss attached to the head a.

The lever 183 is operated, as herein shown, by a cam groove 184 in the front face of the cam disk 93 into which groove extends a suitable roller or projection on the lever 183. The cam groove 184 is suitably shaped to coperate with the roller on the lever 183 and to move the said lever 183 a greater distance than the lever 9b' is moved by its cam 92, so that when the latch arm 179 is engaged with the lever 183 the horn lowering lever 96 will be given an increased movement and the horn will be lowered an increased distance which is sufficient to enable the operator to takeoff andput on work. To permit this extra movement of the lever 96 the cam groove 92 is enlarged for a portion of its length, as shown at 185, see Fig. 5. The arm 179 may be permanently engaged with the lever 183 so as to positively connect the lever 183' with 'the lever 96, this being permissible by reason of the Aenlargement 185 ofthe cam 92, but inthe preferred construction the arm is disconnected from the lever 183 during the operation of the machine and is connected therewith just prior to the stopping movement. The disengagement of the arm 179 is controlled by the dog 175 which is moved by the treadle. hen the treadle is depressed to start the machine the :rock shaft 172 is rocked in the direction indicated by the arrow 190, Fig. 5, through the link 170 and crank 171 and the dog 175 is positively moved back away from the path of movement ofl the arm 17 9 a suflicient distance to permit said armto be moved backward by the beveled end of the lever 183, and when the lever 183m its upward movement has cleared the latch arm a spring 191, see Fig. 9, throws the latch arm away from the lever 183 and against the dog 17 5, thereby enabling the lever 183 to be operated by its cam without performing any work. As shown in Fig. 9 the spring 191 is located in the socket at one side of the longitudinal center of the arm 17 9 and vbears against the end of said socket and against a pin which engages the extension 180 of the lever 96.

lVhen it is desired to stop the machine,

ment of the lever 183 will turn the hornA lowering lever 96 so as to lower the horn a sufficient distance to permit the work to be removed. At or about the time the horn has reached the lowered position just described, the arm 141 of the shipper lever 142 will release the clutch, the brake being applied to the fixed member of the clutch substantially simultaneously with its release. Mechanism is also preferably provided for preventing the lowering of the horn until after the nail has been driven when the foot treadle is released just before the nail is driven. The dog 175 is loose on the rock shaft 172 so thatin case the lever 183 should be in its lower position when the treadle is released claim as new and desire to secure-by Letters Patent of the United v States vis 1. In a machine of the class described, a vertically movable horn, a cam for moving said horn and work thickness compensating connections between said cam and said horn comprising a rack bar, a pallet bar pivoted at one, end and means comprising a lever arranged to act upon said bar at or near its other end for moving said pallet bar positively into locking engagement with said rack bar for the purposes specified.

2. In a machine; of the class described, the combination of the following instrumentalities,'viZ:-a vertically movable horn, a cam shaft provided with a disk or hub having a cam groove shaped to lower the horn suiiiciently to effect the feed of the work and providedwitli an enlargement to permit further downward movement of the horn, a lever connectedy to said horn and acted upon by said cam groove, a secondl cam groove having a greater throw than dthe first mentioned cam groove, a lever positively controlled by said second cam groove, and means to connect said second lever with the first mentioned lever, whereby the second mentioned cam groove may lower the horn a greater distance than the first mentioned cam groove, for t-he purpose specified.

8. In a machine ofthe class described, the combination., of the following instrumentalities, viz :-a verticallyV movable horn, a cam shaft provided with a cani disk or hub having a cam groove shaped to lower Vthe horn sufhciently to permit the feed of the work and provided with anv enlargement to permit further downward movement of the horn, a lever connected to said horn-and acted uponby said camA groove, asecond cam groove having a greater throw than the-first mentioned cam groove, a lever acted upon by said second cam groove, a spring actuated` latch arm havingy a notched end which is engaged by said second mentioned lever, a

rock shaft, a dog loose on said rock shaft,l av spring to-act on said dog, and means to. op-.-

erate saidV rock shaft, substantially as described.

4L. In amachine of the class describedfthe combination of the following instrumentalities, vizz-a vertically movable h0rn,. a cam-shaft provided with a cain disk or hub having a cam groove shaped to lower the horn suiciently toI effect. the feed of the work and providedv with an enlargement to. Y permit further downward. movement of theA horna lever connected-to-said horn and act-v ed upon by said cam groove, a second camv groove having agreater throw than the rst mentioned cam groovea lever acted upon byv saidsecond cam groove, l alatch arm connect-V ed tothe first. mentioned. lever and adapted 1 to engage the second mentionedlever, a; rock shaft, fie-dog; onfsaid rock'shaft toiengage the latch arm withithe second mentioned lever, and a., foot treadle connected to said rock shaft, substantially as described.

5. In amachine, of the class described,

the combination of the following instrudistance to permit the work to be fed and provided with an enlargement to permit the horn tobelowered a further distance, a latch arm pivoted Vtosaid` lever. a dog to act on said latch arm, a rock shaft on which said dog; is mounted, a foot treadle connected to said rock shaft, a second cam groove in said disk, lever cooperating therewith and adapted to engage said lat-ch arm when the pressure is relieved from said foot treadle, substantially as described.-

6. In,` a machine ofthe class described, the combination of the following instrumentalities, viz a vertically movable horn, a spring to normally move it. upward, a main sha-ft, a cam disk thereon having a cam groove, a. lever having-a stud or roller extended into said cam groove, said groove beingshaped; to lower said hornv a sufficient distanccrtopermit the work to be fed and provided withy an enlargement to permit the horn tobe lowered a further distance, a latch arm pivoted to saidY lever. a dog to act on said latch arm, a rock shaft on which said dogfisfmounted, a crank or arm on said rock shaft, a shipper lever,` a link connecting said crank to saidishipper lever, and a foot treadlel connected to said shipper lever, substantially as; described.

y 7. In. a machine of the class described the combination of the following instrumentali- "ties,` viZ'z-a vertically movable horn, a spring to normally move it upward, a main gshaft, a cani disk thereon-y having a cam Egroove, a. lever having aV stud or roller ex- @tended into. said camgroove, said groove being-,shaped to lower said horn a sufficient idistance to permit the work to bev fedf and vprovided with an enlargement jto-permit the lhorn to beV lowered a further distance. a ,latch arm pivotedlto said lever,.a dog to act onA said latch arm, a rock shaft on which said dogl is.r mounted, a crank or arm on said yrock shaft, a shipper-lever, a link connecting said crank to said shipper lever, Vand a gfoot treadle connected-to said shipper lever, and a cam toengage said shipper lever and prevent its prematurely actuating the dog on vthe crank-,shaft when the pressure is removed vfrom the foot. treadle, substantially asV dp- ,scribed Y Y 4 8. Inamachineofth'efclass described, the combination ofV the following instrumentalilties, v-iZ:.-a. vertically movable.V horn, a: camV shaft provided with a cam to lower .said horn, and an intermediate connection from said cam to said horn, which includes a rack bar, a pivoted pallet bar. provided on one of its faces with a plurality of teeth, a yoke-shaped clamp embracing said rack bar and to which said pallet bar is pivoted7 a clamping dog or lever pivoted to the yoke-shaped clamp and engaging the said pallet bar, and means connected to said clamping dog and actuated by the cam on the cam shaft to move said pallet bar into engagement with said rack bar, for the purpose specified.

9. In a machine ofthe class described, the combination of the following instrumentalities, viz a vertically movable horn, a cam name to this specification in the presence of two subscribing witnesses.

JOSEPH M. WIGGIN. Witnesses:

H. DORSEY SPENCER, FREDERICK L. EDMANDS.

Copies of this patent may be obtained for ve cents each, by addressing Washington, D. C.

the Commissioner of Patents, 

